asterisk users - Aug 2003 - Status of ISDN && DTMF (AFAIK): Please add corrections and comments

In this message I try to summarize what I have learned in these last two weeks.
My primary sources of informations were the * list archives and linux ISDN docs.
I ain't no * master, so don't trust too hard.

Relevant messages from the * list for the current discussion are: 009177.html
009268.html 0498.html 0849.html

My setup is an Eicon Diva (HiSax: Eicon.Diehl Diva driver Rev. 1.1.4.2) running
on standard debian woody.

First configure your card and make it work with minicom or something like it,
then go for *. The relevant part of the modem.conf file in my case is:

msn=XXXXXXXX
incomingmsn=*
group=1
device => /dev/ttyI0
device => /dev/ttyI1
features=dtmf,noquelch

In that setup, in extensions.conf I dial with the following line:
exten => _9NXXXXXXX,2,Dial(Modem/g1:${EXTEN:1})
Use Modem/ttyI0 or Modem/ttyI1 if you have channel preferences.

After a standard instalation and setup, my DTMF detection was unreliable. I
received 1,2,3, sometimes 7,8,9, and never 4,5,6. First thing I tried (see the
cited messages) was a kernel upgrade to 2.4.21 (woody has 2.4.18). AFAIK, this
solved the problem. However, based on discussions on this list, I went further
and tried the patches referenced in the messages (thanks to the authors!). I
patched the kernel and a few modem related files in the channels directory
(Pauline Middlelink's patches). Everything is working fine now for DTMF
detection.

Current problems are: 
-outbound calls (h323->*->out) to analog phones have echo. This gets
better with a better mic, but does not disappear. It seems that no solution to
this problem is available.
-my callees complain of the silence supression. I have not looked at it yet.

Please correct and comment.

pedro

Hi Pedro,

On Thu, 2003-08-21 at 21:34, pedro bulach gapski wrote:
> My setup is an Eicon Diva (HiSax: Eicon.Diehl Diva driver Rev. 1.1.4.2)
running on standard debian woody.
I'm not sure, but isn't there a linux capi driver available for that
card? If you, I suggest you try to use the capi driver and chan_capi
(http://www.junghanns.net/asterisk/) instead of chan_modem.
> After a standard instalation and setup, my DTMF detection was unreliable. 
I had similar problems with isdn4linux, but never had any problem using
chan_capi.
> Current problems are: 
> -outbound calls (h323->*->out) to analog phones have echo. This gets
better with a better mic,
> but does not disappear. It seems that no solution to this problem is
available.
chan_capi solved my echo problem completely.
> -my callees complain of the silence supression. I have not looked at it
yet.
I can't comment on h323, as I don't use it.

wkr,

-- 
Envida                     http://www.envida.net/
Armand A. Verstappen       Graadt van Roggenweg 328
armand@nl.envida.net       3531 AH Utrecht
tel: +31 (0)30 298 2255    Postbus 19127
fax: +31 (0)30 298 2111    3501 DC Utrecht
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part
Url :
http://lists.digium.com/pipermail/asterisk-users/attachments/20030821/fe75b392/attachment.pgp